| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a thermoplastic polyurethane molding composition which contains a migratable, but simply removable by-product and has high light- resistance. SOLUTION: The thermoplastic polyurethane molding composition can be obtained by reacting at least one aliphatic polyol having a molecular weight of 450-4,000 g/mol and an OH value of 20-235 with a certain chain extender in such a way that 1,6-hexamethylene diisocyanate may have an equivalent ratio of 1.5:1-14.0:1 relative to the polyol, wherein the composition has a NCO index of 96-105 and contains 0.3-5% by weight of an additive selected from the group consisting of an ester wax, a polyolefine wax, a metal soap, an amide wax, a fatty acid amide and a mixture thereof, 0.1-3% by weight of an ultraviolet absorber, 0.1-5% by weight of a light-resistant stabilizer and 0.05-2% by weight of an antioxidant, relative to the total amount of the polyurethane.</p> |
